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Video Cards
Graphics card (also known as video cards) plays
a vital role in the PC. It obtains the digital
information that the computer creates and turns
it into something the human eye can see. On the
majority of computers, the graphics card exchange
digital information to analog information for
display on the monitor; on laptops, the data remains
digital because laptop displays are digital.
If you look at the screen of a classic PC very
closely, you can see that all of the diverse things
on the screen are made up of distinctive dots.
These dots are called pixels, and each pixel has
a color. On some screens, the pixels might have
just two colors -- black or white. On some screens
today, a pixel can be one of 256 colors. On many
screens, the pixels are full-color and have 16.8-million
possible shades. Since the human eye can only
distinguish about 10-million different colors,
16.8-million colors are more than enough for most
people.
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